To our valued Leidos candidates:

Coronavirus is on everyone's mind with the effects being felt around the world. The markets are volatile, and we're all concerned for the health and safety of our families, friends, and colleagues. Please know that we're taking all necessary measures to safeguard our employees, customers and the communities in which we live, including following all recommended best practices around social distancing.

With that in mind, in an abundance of caution, we are canceling all face to face career events, such as job fairs and open house events. In the coming days and weeks, we will be hosting career events virtually, using our online chat tools so that we may continue our hiring practice safely and securely. You can find available virtual career events at

We are using telephone meetings and online chats via Brazen to conduct interviews and hiring discussions, and we are offering options for video interviews so that you can have a virtual face to face meeting with your potential new leader. We do not conduct interviews or extend offers via text or chat based social media, such as WhatsApp or MySpace.

Leidos will never ask you to provide payment-related information at any part of the employment application process, nor will Leidos ever advance money as part of the hiring process. And Leidos will communicate with you only through emails that are generated by automated system. If you receive an email purporting to be from Leidos that asks for payment-related information or any other personal information, please report the email to Chris Scalia, Leidos’ Senior Vice President of Talent Acquisition, at [email protected].

As a company, as a country, as a world, we have confronted challenging moments before. We are confident that, guided by our values and the strength of our community as well as the commitment we have to the important work we do each day, we will find our way through this time together. We will do this with the care and concern for one another and the common good that defines. Please keep those impacted by the virus in your thoughts.

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Job #: R-00061830
Location: Adelphi, US
Category: Software Development
Schedule (FT/PT): Full Time
Travel Required: Yes, 10% of the time
Shift: Day
Potential for Telework: No
Clearance: Secret
Referral Eligibility: Eligible
Referral Bonus Amount: $3000
Group: Defense

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Job Description:

Leidos is seeking a Senior UI Developer to provide technical expertise to C5ISR Center Sustaining Base Network Assurance Branch (SBNAB) Defensive Cyber Operations (DCO) Security Operations Center (SOC). This position is located at Adelphi, MD and requires an active Secret clearance with ability to obtain TS/SCI clearance.

As the Senior UI Developer, you must have strong API development skills, languages including Java, Scala, and NodeJS.  You will possess strong  Elasticsearch skills, with hands on experience in querying and aggregation for building simple to complex summaries of data. You must also possess strong ReactJS interactive UI development skills as well as strong Kibana dashboard development skills.

Primary Responsibilities:

  • Independently provide software development and operations and maintenance (O&M) support for a mission-critical government system

  • Quickly, effectively and independently resolve complex software-related issues associated with a mission-critical government system

  • Work solely with customers to specify web application requirements, timelines & milestones

  • Develop & maintain a web portal that allows certain authorized personnel to manage users, devices & associated accounts for the Tactical Communications Platform (TCP) using the PHP, JavaScript, JQuery, JQuery-UI, JQuery DataTables, MariaDB SQL programming languages & vendor APIs.

  • Write code in an industry best practices manner that is consistent with FISMA guidelines

  • Ensure code is backed up using an agreed upon version control system; code will be stored within a specified secure storage system

  • Ensure code is commented liberally using an agreed upon code commenting standard

  • Maintain a production environment and a test environment such that operational code (code being used by clients/customers is not broken or compromised due to ongoing development)

  • Schedule maintenance windows to rollout new versions, features or fix bugs

  • Maintain bugfix documents, how-tos & application documentation

  • Ensure old code is not stored on laptops, servers or desktops such that unintended release of the code could compromise operational security

Basic Qualifications

  • Bachelor’s degree with minimum of 8 years of prior relevant experience or a Masters degree with 6+ years experience of relevant experience.  May possess a Doctorate in technical domain.

  • Experience providing O&M support to complex, mission-critical systems

  • Experience working independently to troubleshoot and correct operational issues

  • Experience working closely with customers and users to troubleshoot and resolve complex user issues

  • Ability to work and brief customer to include senior management

  • Experience with JavaScript, Scala, NodeJS, JQuery

  • Strong Elasticsearch, ReactJS interactive and Kibana dashboard development skills

  • Active Secret clearance with ability to obtain TS/SCI clearance

  • Excellent communication skills

  • Customer interface experience

  • Excellent teamwork skills

  • Must hold IAT Level II 8570 Certification prior to start date.

  • Must hold Computing Environment Certification prior to start date.

  • Must hold CSSP Infrastructure Support 8570 Certification or obtain within 45 days of start date.

​Preferred Qualifications

  • Agile Software Development Experience

  • Technical Writing and Documentation Experience

  • Security Engineering Experience



External Referral Eligible

External Referral Bonus:


External Referral Bonus $:


Potential for Telework:


Clearance Level Required:



Yes, 10% of the time

Scheduled Weekly Hours:




Requisition Category:


Job Family:

Software Development

Pay Range:

About Leidos

Leidos is a Fortune 500® information technology, engineering, and science solutions and services leader working to solve the world’s toughest challenges in the defense, intelligence, homeland security, civil, and health markets. The company’s 40,000 employees support vital missions for government and commercial customers. Headquartered in Reston, Virginia, Leidos reported annual revenues of approximately $12.30 billion for the fiscal year ended January 1, 2021. For more information, visit

Pay and Benefits

Pay and benefits are fundamental to any career decision. That's why we craft compensation packages that reflect the importance of the work we do for our customers. Employment benefits include competitive compensation, Health and Wellness programs, Income Protection, Paid Leave and Retirement. More details are available here.

Securing Your Data

Leidos will never ask you to provide payment-related information at any part of the employment application process. And Leidos will communicate with you only through emails that are sent from a email address. If you receive an email purporting to be from Leidos that asks for payment-related information or any other personal information, please report the email to [email protected].

Commitment to Diversity

All qualified applicants will receive consideration for employment without regard to sex, race, ethnicity, age, national origin, citizenship, religion, physical or mental disability, medical condition, genetic information, pregnancy, family structure, marital status, ancestry, domestic partner status, sexual orientation, gender identity or expression, veteran or military status, or any other basis prohibited by law. Leidos will also consider for employment qualified applicants with criminal histories consistent with relevant laws.

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